CN114337501A - Arch flexible photovoltaic supporting structure who supports - Google Patents

Abstract

The invention discloses an arch-supported flexible photovoltaic support structure, and a flexible photovoltaic support system comprises: the foundation structure is used as a supporting foundation of the whole flexible photovoltaic support structure; the prestressed cable structure comprises a plurality of rows of flexible bearing cable units transversely fixed on the upper part of the foundation structure, and a photovoltaic assembly is fixed on each row of bearing cable units; the supporting structure is arranged below the prestressed cable structure and used for supporting the bearing cable units, the supporting structure comprises at least two rigid arch bars which are transversely arranged, a plurality of rigid connecting rods which are longitudinally connected between every two adjacent arch bars and a plurality of rigid supporting rod units which are respectively fixed on the arch bars and the connecting rods, and a row of supporting rod units are correspondingly fixed below each row of bearing cable units. The scheme has the advantages of large space span, large rigidity, strong structural stability and the like, and can adapt to various complex terrains without additionally supporting in the middle.

Description

An arch-supported flexible photovoltaic support structure

technical field

The invention relates to the technical field of solar energy applications, in particular to a flexible photovoltaic support structure supported by an arch.

Background technique

As a typical renewable energy, solar energy will play an important role in the future energy pattern due to its abundant resources and low environmental pollution. At present, with the increasing shortage of high-quality land resources suitable for photovoltaic installations, the development of traditional rigid photovoltaic supports is gradually limited due to factors such as wide area and high site flatness requirements. Compared with the traditional rigid photovoltaic support, as a new type of photovoltaic structure, flexible photovoltaic support has the advantages of large span and wide adaptability, and it saves land resources and has developed rapidly in recent years. However, there are some obvious deficiencies in the structure and structural system of the existing suspension cable flexible photovoltaic support. As the span of the support increases, the stiffness and stability of the entire structural system decrease, and additional supports are often required between the main spans. Support, such as the flexible photovoltaic supports disclosed in the patent "CN201610263334" and the patent "CN201720899833". For some current practical projects (especially channels), the middle of the main span is not suitable and does not have the conditions to add intermediate supports, so that the conventional flexible photovoltaic support solution is no longer applicable. Therefore, how to build a stable and reliable flexible photovoltaic support in a large-span space such as channels that are not suitable for adding intermediate supports, and how to form a large-span photovoltaic module support structure is a key engineering and technical problem that needs to be solved urgently.

SUMMARY OF THE INVENTION

In view of the deficiencies in the prior art, the purpose of the present invention is to provide a flexible photovoltaic support structure supported by an arch. This scheme has the advantages of large space span, high rigidity and strong structural stability, and can adapt to various complex terrains without additional support in the middle.

In order to solve the above-mentioned technical problems, the present invention is realized through the following technical solutions:

An arch-supported flexible photovoltaic support structure, the flexible photovoltaic support system includes:

a basic structure, the basic structure is used as a supporting basis for the entire flexible photovoltaic support structure;

a pre-stressed cable structure, the pre-stressed cable structure comprising multiple rows of flexible load-bearing cable units laterally fixed on the upper part of the base structure, and photovoltaic modules are fixed on each row of the load-bearing cable units; and

a support structure, the support structure is arranged below the prestressed cable structure and used to support the load-bearing cable unit, the support structure comprises at least two rigid arch rods arranged transversely, longitudinally connected to two adjacent arches A plurality of rigid connecting rods between the rods and a plurality of rigid strut rod units respectively fixed on the arch rods and the connecting rods, and a row of the strut rod units is correspondingly fixed under each row of the load-bearing cable units.

Preferably, the basic structure includes at least two columns of vertical columns arranged longitudinally and bearing beams connecting the upper ends of the columns in the same column together, and a plurality of rows of the bearing cable units are transversely connected between the two adjacent columns of bearing beams.

Further preferably, stay cables are respectively fixed on the outer sides of the two columns, and the other ends of the stay cables are connected to the side anchors.

Preferably, each row of the load-bearing cable units is composed of two load-bearing cables, and each support rod unit is composed of two support rods, the upper ends of the two support rods are respectively fixed on the two load-bearing cables, and the lower ends of the two support rods are interlaced at one point to fix On the arch rod, a triangular cable truss structure is formed.

Preferably, both ends of the arch rod are provided with end supports, and a construction cable for adjusting the bearing capacity of the arch rod is fixed on the arch rod.

Preferably, the arch rod, the connecting rod and the strut unit, and the connecting rod and the strut unit are respectively fixedly connected through a reinforced connection structure.

Further preferably, the reinforced connection structure includes a connecting ring through which the arch rod and the connecting rod pass through and is adapted to it, and a mounting seat fixed on the top of the connecting ring, between the mounting seat and the strut unit. The connection is fixed by means of fasteners.

Preferably, two adjacent rows of the strut units are stably connected by connecting pieces.

Further preferably, the connecting piece is longitudinally connected between the upper end of the strut unit and the upper end of the adjacent strut unit, and the upper end of the strut unit is connected obliquely with the lower end of the adjacent strut unit. There are said connectors.

Further preferably, the connecting member adopts a flexible stabilizer cable and/or a rigid stabilizer bar.

Compared with the prior art, the present invention has the following advantages and beneficial effects:

The invention realizes large span by installing arch rods under the load-bearing cables of the flexible photovoltaic support structure, without adding intermediate supports; rigid arch rods are used to replace part of the suspension cables, and the arch rods are connected by connecting rod welding, which is convenient for later stages The whole structural system has high rigidity, good wind resistance and stability, and the force transmission path is clear, which can better control the cracking problem of photovoltaic modules. From the comparison calculation results of the first-order natural vibration frequency of the scheme used in the present invention and the scheme without arch support, it can be seen that the first-order natural frequency of the scheme used in the present invention increases by 49.5% compared with the scheme without arch support, and the stiffness is greater. . The above beneficial effect statement shows that this scheme has a good engineering practical prospect.

Description of drawings

1 is a schematic elevational structure diagram of an arch-supported flexible photovoltaic support according to an embodiment of the present invention;

2 is a three-dimensional schematic diagram of a flexible photovoltaic support structure supported by a single row of arches according to an embodiment of the present invention (construction cables are omitted);

3 is a schematic diagram of a three-dimensional structure of an arch-supported flexible photovoltaic support according to an embodiment of the present invention (construction cables are omitted);

4 is a schematic diagram of a three-dimensional structure of an arch-supported flexible photovoltaic support according to an embodiment of the present invention (with photovoltaic components and construction cables omitted);

5 is a three-dimensional schematic diagram of the connecting node between the strut unit and the arch rod according to the embodiment of the present invention;

6 is a three-dimensional schematic diagram of the connecting node of the connecting rod, the arch rod and the strut unit according to the embodiment of the present invention;

7 is a three-dimensional schematic diagram of a strut unit and a connecting rod connection node according to an embodiment of the present invention;

8 is a schematic diagram of the first-order mode shape after the arch rod of the flexible photovoltaic support of the present invention is cancelled;

FIG. 9 is a schematic diagram of the first-order mode shape of the flexible photovoltaic support supported by the arch according to the embodiment of the present invention.

Reference numerals: 1-basic structure; 11-column; 12-bearing beam; 13-stayed cable; 14-side anchor; 2-prestressed cable structure; 21-bearing cable unit; 211-bearing cable; 3-support Structure; 31-arch rod; 32-link; 33-strut unit; 331-strut; 34-reinforced connecting structure; 341-connecting ring; 342-mounting seat; 343-fastener; 35-construction cable; 4-connector; 5-photovoltaic module.

Detailed ways

In order to make those skilled in the art better understand the technical solutions of the present invention, the preferred embodiments of the present invention will be described below in conjunction with specific examples, but it should be understood that the accompanying drawings are only used for exemplary description, and should not be construed as a reference to the present invention. Limitation; in order to better illustrate this embodiment, some parts of the drawings will be omitted, enlarged or reduced, which do not represent the size of the actual product; for those skilled in the art, some well-known structures and their descriptions in the drawings may be The omission is understandable. The positional relationships described in the drawings are only for exemplary illustration, and should not be construed as a limitation on the present patent.

Referring to FIGS. 1 to 7 , the present invention provides a flexible photovoltaic support structure supported by an arch. The photovoltaic support structure includes a base structure 1 , a prestressed cable structure 2 , a support structure 3 and a photovoltaic assembly 5 , wherein the base structure The structure 1 is used as the support base for the entire flexible photovoltaic support structure; the prestressed cable structure 2 includes multiple rows of flexible load-bearing cable units 21 that are laterally fixed on the upper part of the base structure 1, and photovoltaics are fixed on each row of the load-bearing cable units 21 Assembly 5 ; the support structure 3 is arranged below the prestressed cable structure 2 and used to support the load-bearing cable unit 21 .

The basic structure 1 includes at least two columns of vertical columns 11 arranged longitudinally and bearing beams 12 connecting the upper ends of the columns 11 in the same column together, and a plurality of rows of the bearing cable units 21 are laterally connected between two adjacent columns of bearing beams 12 . . An anchoring column required for anchoring the bearing cable 211 is arranged on the bearing beam 12 , and the bearing beam 12 can be made of I-beam or L-shaped steel. A stay cable 13 is respectively fixed on the outer side of the two columns of the uprights 11 , and the other end of the stay cable 13 is connected with the side anchor 14 to resist the pretension of the bearing beam 12 .

Specifically, the column 11 is made of PHC pipe piles, and the diameter is selected from 300mm to 600mm according to actual needs; the bearing beam 12 can be made of I-beam or L-shaped steel, and a column 11 can be added to the bearing beam 12 to adjust the inclination of the photovoltaic module 5; The load-bearing cable 211 is a flexible cable, using steel strands, and the specification is 12.6-21.6.

Wherein, each row of the load-bearing cable units 21 is composed of two load-bearing cables 211, the load-bearing cables 211 are arranged horizontally, and the two ends are connected to the load-bearing beam 12 after applying pretension, and the photovoltaic module 5 is fixed on the two load-bearing cables 211; Each strut unit 33 is composed of two struts 331, the upper ends of the two struts 331 are respectively fixed on the two bearing cables 211, and the lower ends of the two struts 331 are interwoven at one point and fixed on the arch rod 31 to form a triangular cable truss structure; The load is transmitted between the load-bearing cable 211 and the arch rod 31 through two braces 331 . Specifically, the support rod 331 is a round tube with a diameter of 50mm˜80mm.

Wherein, the support structure 3 includes at least two rigid arch rods 31 arranged laterally, a plurality of rigid connecting rods 32 longitudinally connected between two adjacent arch rods 31 , and fixed to the arch rods 31 and 31 respectively. For the plurality of rigid strut units 33 on the connecting rod 32 , a row of the strut units 33 is correspondingly fixed to each row of the load-bearing cable units 21 . For the photovoltaic structure with multiple rows of flexible supports, the load-bearing cable 211 can transmit its load to the connecting rod 32 through the strut unit 33, and finally transmit the load to the arch rod 31 through the connecting rod 32; Multiple connecting rods 32 are welded to increase the rigidity of the entire flexible photovoltaic support system.

Specifically, both ends of the arch rod 31 are provided with end supports, and the load is transmitted to the end supports through the arch rod 31. The arch rod 31 can be a variable-section round rod or an arch truss, and a round tube is used. The diameter of the truss is 150mm to 240mm, and it needs to be partially thickened at the ends and other parts; the diameter of the truss is 50mm to 90mm; the arch rod 31 is fixed with a structural cable 35 that can adjust the bearing capacity of the arch rod 31, and two structural cables 35 Cross-arranged; the connecting rod 32 adopts a steel round tube with a diameter of 100mm-200mm.

Specifically, the arch rod 31 , the connecting rod 32 and the strut unit 33 are fixedly connected through the reinforcing connecting structure 34 , and the connecting rod 32 and the strut unit 33 are respectively fixedly connected. The reinforcing connecting structure 34 includes a connecting ring 341 through which the arch rod 31 and the connecting rod 32 pass through and is matched with it, and a mounting seat 342 fixed on the top of the connecting ring 341, and the mounting seat 342 is connected to the strut unit. 33 are fixedly connected by fasteners 343, and the fasteners 343 are composed of bolts and nuts.

Specifically, two adjacent rows of the strut units 33 are stably connected by the connecting member 4 . The connecting piece 4 is longitudinally connected between the upper end of the strut unit 33 and the upper end of the adjacent strut unit 33 , and the upper end of the strut unit 33 is connected obliquely with the lower end of the adjacent strut unit 33 There are said connecting pieces 4 . The connecting piece 4 adopts a flexible stabilizing cable and/or a rigid stabilizing rod, and the rigid stabilizing rod adopts a steel round tube with a diameter of 60mm-90mm.

As shown in Figure 8, when the arch rod in the solution of the present invention is cancelled, the calculation result of its first-order natural vibration frequency is 0.416 Hz, and the lateral deformation of the first-order mode shape is relatively large, indicating that the wind resistance ability in the lateral direction is poor, and the Additional lateral stabilization systems are required.

As shown in Figure 9, when the scheme of the present invention is adopted, the calculation result of the first-order natural vibration frequency is 0.622 Hz, which is 49.5% higher than that of the scheme without arch support, and the stiffness is higher, and there is no need to add additional lateral Stabilize the system.

According to the description of the present invention and the accompanying drawings, those skilled in the art can easily manufacture or use the arch-supported flexible photovoltaic support structure of the present invention, and can produce the positive effects described in the present invention.

Unless otherwise specified, in the present invention, if the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", " The orientation or positional relationship indicated by horizontal, top, bottom, inner, outer, clockwise, counterclockwise, axial, radial, circumferential, etc. is Based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore the present invention The terms describing the orientation or positional relationship are only used for exemplary illustration, and should not be construed as a limitation on this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific situations with reference to the accompanying drawings.

Unless otherwise specified and limited, in the present invention, the terms "arranged", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection ; It can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Any simple modifications and equivalent changes made to the above embodiments according to the technical essence of the present invention fall into the scope of the present invention. within the scope of protection.

Claims (10)

1. A flexible photovoltaic support structure supported by an arch, wherein the flexible photovoltaic support system comprises: a base structure (1), the base structure (1) being used as a support base for the entire flexible photovoltaic support structure; A prestressed cable structure (2), the prestressed cable structure (2) includes multiple rows of flexible load-bearing cable units (21) laterally fixed on the upper part of the base structure (1), and each row of the load-bearing cable units (21) is fixed on have photovoltaic modules (5); and A support structure (3), the support structure (3) is provided below the prestressed cable structure (2) and used to support the load-bearing cable unit (21), the support structure (3) comprises at least two laterally arranged a plurality of rigid arch rods (31), a plurality of rigid connecting rods (32) longitudinally connected between two adjacent arch rods (31), and respectively fixed to the arch rods (31) and the connecting rods ( 32) on the plurality of rigid strut units (33), and a row of the strut units (33) is correspondingly fixed under each row of the load-bearing cable units (21). 2 . The flexible photovoltaic support structure supported by the arch according to claim 1 , wherein the base structure ( 1 ) comprises at least two columns ( 11 ) arranged longitudinally and the upper ends of the columns ( 11 ) in the same column are connected together. 3 . A plurality of rows of the load-bearing cable units (21) are laterally connected between two adjacent rows of load-bearing beams (12). 3 . The flexible photovoltaic support structure supported by the arch according to claim 2 , characterized in that: stay cables ( 13 ) are respectively fixed on the outer sides of the two columns of the uprights ( 11 ), and the other ends of the stay cables ( 13 ) are respectively fixed. 4 . Connected to side anchors (14). 4. The flexible photovoltaic support structure supported by an arch according to claim 1, wherein each row of the load-bearing cable units (21) is composed of two load-bearing cables (211), and each strut unit (33) is composed of It consists of two struts (331), the upper ends of the two struts (331) are respectively fixed on the two load-bearing cables (211), and the lower ends of the two struts (331) are interwoven at one point and fixed on the arch bar (31) to form a triangular cable truss structure . 5. The flexible photovoltaic support structure supported by an arch according to claim 1, characterized in that: both ends of the arch rod (31) are provided with end supports, and an adjustable arch is fixed on the arch rod (31). A construction cable (35) for the carrying capacity of the rod (31). 6 . The flexible photovoltaic support structure supported by an arch according to claim 1 , characterized in that: between the arch rod ( 31 ), the connecting rod ( 32 ) and the strut unit ( 33 ), the connecting rod (32) and the strut unit (33) are respectively fixedly connected through a reinforcing connection structure (34). 7 . The flexible photovoltaic support structure supported by an arch according to claim 6 , wherein the reinforcing connection structure ( 34 ) comprises an arch rod ( 31 ) and a connecting rod ( 32 ) to pass through and fit with it. 8 . A connecting ring (341) and a mounting seat (342) fixed on the top of the connecting ring (341), the mounting seat (342) and the strut unit (33) are fixedly connected by a fastener (343). 8 . The flexible photovoltaic support structure supported by the arch according to claim 1 , wherein the strut units ( 33 ) in two adjacent rows are stably connected by connecting pieces ( 4 ). 9 . 9 . The flexible photovoltaic support structure supported by the arch according to claim 8 , wherein the connection is longitudinally connected between the upper end of the strut unit ( 33 ) and the upper end of the adjacent strut unit ( 33 ). 10 . The connecting piece (4) is connected obliquely between the upper end of the strut unit (33) and the lower end of the adjacent strut unit (33). 10 . The arch-supported flexible photovoltaic support structure according to claim 8 or 9 , wherein the connecting member ( 4 ) adopts a flexible stabilization cable and/or a rigid stabilization rod. 11 .

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